Year	Number
1996	0.264631718397141
1998	0.274148970842361
2000	0.486361712217331
2002	0.547456383705139
2003	1.12089920043945
2004	1.3520268201828
2005	1.28561401367188
2006	0.973312020301819
2007	0.456923127174377
2008	0.479434996843338
2009	0.605377018451691
2010	0.573578119277954
2011	0.607760488986969
2012	0.62878555059433
2013	0.757722914218903
2014	1.20616853237152
2015	1.18745315074921
2016	1.39056718349457
2017	1.40712821483612
2018	1.22957813739777
2019	1.2152909040451
2020	1.13746881484985
2021	1.02887463569641
2022	1.12756788730621